Removal of parallax, may be achieved by focussing (A) The objective (B) The eye-piece (C) The objective and the eye-piece (D) None of these

Removal of parallax, may be achieved by focussing 

(A) The objective 

(B) The eye-piece 

(C) The objective and the eye-piece 

(D) None of these 

by

1 Answer

Answer :

(C) The objective and the eye-piece 

by

Related questions

An internal focussing type surveying telescope, may be focussed by the movement of (A) Objective glass of the telescope (B) Convex-lens in the telescope (C) Concave lens in the telescope (D) Plano-convex lens in the telescope

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Last Answer : (C) Concave lens in the telescope 

Which one of the following statements is not correc t? (a) Parallax error is eliminated when there is no change in the staff reading when eye is moved up and down (b) The objective lens is to be focused towards a white or bright background for clear visibility of cross-hairs (c) Temporary adjustments of the dumpy level are to be performed at every set up (d) The eyepiece need not be adjusted after the first set up when the same surveyor is taking readings

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Last Answer : (b) The objective lens is to be focused towards a white or bright background for clear visibility of cross-hairs

While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is (A) Correctly focussed (B) Not correctly focussed (C) Said to have parallax (D) Free from parallax

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The real image of an object formed by the objective must lie (A) In the plane of cross hairs (B) At the centre of the telescope (C) At the optical centre of the eye-piece (D) Anywhere inside the telescope

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In a theodolite a condition arising when the image formed by the objective is not in the plane of cross hairs is known as (a) Parallax* (b) Out of sight (c) Out of place (d) Transiting

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In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is (A) 5.24 cm (B) 6.24 cm (C) 7.24 cm (D) 8.24 cm

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The objective of governmental effectiveness or program auditing is to determine if the desired results of a program are being achieved. What is thefirst step in conducting such an audit?a. Identify the legislative intent of theprogram being audited.b. Collect quantifiable data on theprogram's success or failure.c. Determine the time frame to beaudited.d. Evaluate the system used tomeasure results.

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